Reply to thread

Message

<blockquote data-quote="CBFryman2" data-source="post: 1398420" data-attributes="member: 565445">Wow, a lot of misinformation here.How low a person can hear, as in actually hear, is limited to the individual. 20Hz is a generalization but in most cases its more of a tactile sence than it is a sound.How low a person can sence is directly related to how much power and displacement you have.Sound is not an EMF so therefore it has nothing to do with a 30kHz radio wave //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifSound is a mechanical waves (compression) of peaks and troughs in air pressure. the ocilating air pressure vibrates a thing disk of skin called the ear drum connected to a few bones that are connected to a few nerves and that is how you hear.30Hz is reletively low tuning for car system (ported), its a good all around tuning for car as long as the given enclosure provides good transient responce at with that tuning.Tuning of a 4th order Bass Reflux enclosure (aka ported) is dependant on Port cross sectional area and length in relation to net enclosure volume (in other words the volume of the enclsoure not including the volume of the port). The longer the port of a given cross section and net volume the lower the tuning. You can use this big long anoying formula or yo ucan use a program like WinISD or the many port calculators on the itnternet to find how long to make your port to tune to a desired frequincy.</blockquote>

[QUOTE="CBFryman2, post: 1398420, member: 565445"] Wow, a lot of misinformation here. How low a person can hear, as in actually hear, is limited to the individual. 20Hz is a generalization but in most cases its more of a tactile sence than it is a sound. How low a person can sence is directly related to how much power and displacement you have. Sound is not an EMF so therefore it has nothing to do with a 30kHz radio wave [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] Sound is a mechanical waves (compression) of peaks and troughs in air pressure. the ocilating air pressure vibrates a thing disk of skin called the ear drum connected to a few bones that are connected to a few nerves and that is how you hear. 30Hz is reletively low tuning for car system (ported), its a good all around tuning for car as long as the given enclosure provides good transient responce at with that tuning. Tuning of a 4th order Bass Reflux enclosure (aka ported) is dependant on Port cross sectional area and length in relation to net enclosure volume (in other words the volume of the enclsoure not including the volume of the port). The longer the port of a given cross section and net volume the lower the tuning. You can use this big long anoying formula or yo ucan use a program like WinISD or the many port calculators on the itnternet to find how long to make your port to tune to a desired frequincy. [/QUOTE]

Verification